Adsense is just a way to monetize your content with ads. It has nothing to do with Search engine optimization (SEO).
Google has another program that is called AdSense and this allows website owners to publish advertisements on their blog/website. It is 100% free and is very easy to sign up for. Once you create an account, you will be able to choose from a wide variety of ads that can be placed on your blog/website. Each ad can be customized and setup to match your site layout and niche. Once you have advertisements on your website, you will earn money for each click that your ads receive. The amount per click depends on the type of ad, amount the advertiser is paying per click, keywords, and the category. You can earn cents and all the way up to dollars for each click.
Google AdSense is a program run by Google Inc. that allows publishers in the Google Network of content sites to serve automatic text, image, video, and rich media adverts that are targeted to site content and audience.
Adsense will pay you anywhere from 0.01 per click to $10+ per click. The more 'sellable' your website's niche is, on average the higher the CPC. Even them though, there are some clicks you will only get paid 7 cents, and other you will receive $2. The goal is just to get as much traffic as possible so that when those $2 ads are floating around you get a piece of them
By far the best way of monetizing a blog/website provided you are not looking to promote sellable products.
Google AdSense is a program through which a person can put advertisements on his website and earn some amount of money according to the number of visitors who click the ad. Thus, more is the number of clicks more is the money earned.
its Revenue generating system for website/ blog owners, Place an ad code on your site and start making money (if your site has good traffic)